420202240225 has 24 divisors (see below), whose sum is σ = 537905214720. Its totient is φ = 325289832000.

The previous prime is 420202240223. The next prime is 420202240231. The reversal of 420202240225 is 522042202024.

It is not a de Polignac number, because 420202240225 - 2¹ = 420202240223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 420202240225.

It is not an unprimeable number, because it can be changed into a prime (420202240223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16642911 + ... + 16668139.

It is an arithmetic number, because the mean of its divisors is an integer number (22412717280).

Almost surely, 2^420202240225 is an apocalyptic number.

It is an amenable number.

420202240225 is a deficient number, since it is larger than the sum of its proper divisors (117702974495).

420202240225 is a wasteful number, since it uses less digits than its factorization.

420202240225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46761 (or 46756 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 420202240225 its reverse (522042202024), we get a palindrome (942244442249).

The spelling of 420202240225 in words is "four hundred twenty billion, two hundred two million, two hundred forty thousand, two hundred twenty-five".